Deck General (Supplementary) USCG Q#396 (Set 8)

BOTH INTERNATIONAL & INLAND The term "prolonged blast" means a blast of __________.

Official USCG Answer & Rule Citation

Correct Answer: Option D — four to six seconds duration

Annex III of the COLREGS explicitly defines a prolonged blast as a whistle signal lasting between four to six seconds, used extensively in restricted visibility and maneuvering contexts.

All Deck General (Supplementary) Sets Practice Set 8